2003A&A...409..275N


Query : 2003A&A...409..275N

2003A&A...409..275N - Astronomy and Astrophysics, volume 409, 275-286 (2003/10-1)

Rotation and magnetic field in the Be star ome Ori.

NEINER C., HUBERT A.-M., FREMAT Y., FLOQUET M., JANKOV S., PREUSS O., HENRICHS H.F. and ZOREC J.

Abstract (from CDS):

objS{ome Ori}{ω Ori} is a B2IIIe star for which rotational modulation and non-radial pulsations (NRP) have been recently investigated from two independent observational campaigns in 1998 and 1999. Putting the data of these 2 campaigns together, and adding data obtained in 2001, we search for multiperiodicity in the line profile variations and evidence for outbursts. From new spectropolarimetric data obtained at the Telescope Bernard Lyot (TBL, Pic du Midi, France) in 2001 we also measure the Stokes V parameter in the polarised light. We find evidence for the presence of a weak magnetic field in ω Ori sinusoidally varying with a period of 1.29d. The equivalent widths (EW) of the wind sensitive UV resonance lines also show a variation with the same period, which we identify as the rotational period of the star. We propose an oblique rotator model and derive Bpol=530±230G to explain the observations. Moreover, we carry out an abundance analysis and find the star to be N-enriched, a property which is shared with other magnetic stars. We propose ω Ori as the first known classical Be star hosting a magnetic field.

Abstract Copyright:

Journal keyword(s): stars: magnetic fields - stars: oscillations - stars: winds, outflows - stars: individual: ω Ori

VizieR on-line data: <Available at CDS (J/A+A/409/275): table7.dat>

Simbad objects: 6

goto Full paper

goto View the references in ADS

Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 * gam Peg bC* 00 13 14.1512308 +15 11 00.936759 1.75 2.61 2.84 2.94 3.13 B2IV 675 0
2 * zet Cas Pu* 00 36 58.2841866 +53 53 48.867311 2.58 3.47 3.66 3.74 3.95 B2IV 435 0
3 * sig Ori E Y*O 05 38 47.2050040320 -02 35 40.521424812 5.66 6.38 6.46 6.84 7.08 B2IV-Vp_He 424 0
4 * ome Ori Be* 05 39 11.1463172 +04 07 17.279475 3.73 4.48 4.59 4.57 4.67 B3Ve 397 1
5 * mu. Cen Be* 13 49 36.9886294 -42 28 25.429594 2.37 3.27 3.43 3.41 3.50 B2Vnpe 421 0
6 * bet Cep bC* 21 28 39.5968513 +70 33 38.574681 2.05 3.01 3.23 3.33 3.55 B0.5IIIs 701 0

To bookmark this query, right click on this link: simbad:objects in 2003A&A...409..275N and select 'bookmark this link' or equivalent in the popup menu


2022.05.22-00:14:20

© Université de Strasbourg/CNRS

    • Contact